Tackle block



Dec. 18 1923,

- 1,47 7,639 L. E. FISHBACK TACKLE BLOCK Filed Feb. 13 1923 PatentedDec. 18, 1923.

LLOYD near. FISHBAGK, or an nonnno, ARKANSAS.

TACKLE BLOCK.

Application. filed February 13, 1923. Serial No. 618,854.

To all whom it may concern:

Be it known that l, LLOYD EARL Frsrr nnolga citizen of the United Statesof America, and resident of El Dorado, in the county of Union and StateofArkansas, have invented certain new and useful Improve ments in TackleBlocks, of which the fol lowing is a specification.

This invention relates to .block: and

H) tackle, and particularly to a device intended for use primarily inconnection with the drilling of deep wells and the like, the saidinvention having novel means whereby'the number of lines or strands ofcable may be expeditiously changed to suit the conditions incident tothe progress of work during the drilling process.

It is, of course, well known to those skilled in the art that as thenumber of lines increases, greater strength results, but the rapidity ofmovement of. the drilling tool is decreased. Under certain conditions ofdrilling, however, as where the drilling tool has descended apredetermined depth, more than two lines are necessary in the successfuloperation of the drilling rig, whereas when the tool is at less depth,the operation may be successful by the use of two lines and when twolinesare used a correspond- :40 ingly increased speed of action results.

It is an object of this invention, therefore, to provide novel meanswhereby the number of lines employed on a block may be expeditiouslychanged as the work pro- 35 gresses; as, for instance, when the tool'isbeing applied or. removed from a hole the depth of which is beyond 2500feet, it will be desirable in raising the tool to employ four linesuntil the tool has been raised a where it is 2500 feet in the ole; Themovement imparted to the tool when four lines were employed would berather slow, but if at the depth indicated it would be safe to use buttwo lines and the block could be adjusted to permit the removalof twolines in order that the further operation would be performed with theremaining two lines, and when this is done, the movement imparted to thetool would be accelerated, as compared with its movement prior to thechange. V V The invention is capable, therefore, of permitting the linesto be expeditiously changed to suit the conditions desirable during theprogress of the work, and to that predetermined degree, say' to thepoint end, the block has a sectional cheek with a novel jointtherebetween to permit the disengagement of the sections and the removalor application of lines to the sheaves, ac cording to the requirementsin practice.

With the foregoing and other objects in view, the invention consists inthe details of construction, and in the arrangement and combination ofparts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to theaccompanying drawings forming part of this application wherein likecharacters denote corresponding parts in the several views, and inwhich-' Figure 1 illustrates a view in elevation of a block embodyingthe invention;

Figure 2 illustrates a side elevation there of;

Figure 3' illustrates a perspective view of one of the cheek sections;

Figure 4. illustrates a perspective view of the co-acting cheek section;and

Figure 5 illustrates a perspective view of the couplingfor the saidsections.

In the present embodiment of the invention, I have illustrated a blockshell comprising a'solid check and a cheek comprising the sections 11and 12,- the said cheeks being connected: by bolts 13 and 14 and apintle 15 on which latter sheaves 16 are rotatable.

The cheek sections 11 and 12 have flanges 17 and 18 on their respectiveedges that are in proximity to each other, and a coupling 19 haschannels 20 and 21 that receive the respective flanges. 7 r

The lower and upper edges of the cow pling are slotted as at 22 and 23toform clearances for the. cheek sections 11 and V 12 respectively 'whenthe coupling is applied to the flanges for retaining the parts in theassembled positions shown in Fig. 1.

It will be apparent from an inspection of the drawing and from theforegoing description that the coupling may be removed from the cheeksections to free the same, and when this is done, the cheek section 12may be turned upwardly on or wholly removed from the bolt 13, producinga clearance which will permit the application or removal of the cable tothe sheaves of the block. This provision for permitting the cable to beremoved laterally of the shell will result in the advantages referred a1 V I ,1,477,e39

to initially as constituting in part, at least, sections of the; cheek,fa coupling h aving the objeets ofthe invention, and this will, channelstherein for the receptibivof the: 1 it thought, be understoo-d'by thoseskilled *fisgnges alid-having slots forming icleairanee's in the artWithout further detail explanafor theysaid sectio ngmeans iorconnect-ingN i 5 tien thereof; .7 i the cheeks together, and sheaivesjrotatablyr Iclaim: mounted between theiche'eks. I

V In a block a solid ciieek and a setidfial V V cheek, flanges onthezidj'acent edges of the LLOYDEARL FISHBACK;

